The short version: Uber didn’t like San Antonio’s proposed regulations very much — it particularly objected to the mandatory fingerprinting and random drug-testing of Uber drivers — and wanted a more liberal approach, like the one in place in Austin. On a number of occasions, Uber made public threats to pull up and quit San Antonio entirely, leaving its tens of thousands of customers cheesed off and stranded. The company was engaged in confidential negotiations with the city, and the city thought that they were near a compromise when Uber made good on its threat to exit. A few months later, San Antonio gave Uber most of what it wanted, and Uber returned.